On their dying planet, the Autobots and Decepticons battle fiercely for control of the AllSpark in the Transformers universe's origin story. Stream Transformers: War for Cybertron: Siege free in HD on Gemflix — no signup, no account. 2020 · 1 season · Animation, Action & Adventure, Sci-Fi & Fantasy. Transformers: War for Cybertron: Siege seasons: Season 1 (2020, 6 episodes).